Merge pull request #207 from raistlinthewiz/develop

Huge pack of changes, fixes! (contains major extraNonce fix!)
Merge pull request #209 from raistlinthewiz/develop

Created a simple installer script for ubuntu.
Fixed readme - getting started.
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update .travis.yml
Another ubuntu installer fix.